Adding-machine-ribbon attachment



July 6 1926. 1,591,243 I 4 B. 5. SMITH ADDING MACHINE RIBBON ATTACHMENT Filed April 8, 1924 l I 1 l f l I l /b [6 1 I I l l .gnwnto'z E2. BENJAMIN 5 .5QM7 TH Patented 1 uly/ 6, 192 6 mam-meme snimir, swam, TEXAS}: I

Application file'd nprilci'lw'if snaifn't; #021,919. 2

The present inventi'en' con'sistsof a ribbon spool attachmentv for adding machines and like structures which employ ribbons used for expressing indicia which urges the-ribbon against paper or the like trained around 7 a platen. r

. An object of the invention is to provide an attachment for adding machine ribbon spools which permits'a new ribbon to be of a service man-.,

substituted'for an old, one 'inajfacile.and expeditious manner without the assistance It is well'known in the art-to equip a one end of a ribbon may be engaged, but it is the principal object of the present inven tion to use an elastic vmedium on'the ribbon spool which, medium may be expanded into.

other Objects of the invention Will be al parent from the following description of r .the present preferred form of the invention 7 taken .in connection with draw1ngswhere1n:

the 'accompanying the elastic means -".Fi g 1 is a plan view of P ese constructed in accordance with the invention; r

, Fig. 2' is a side elevational view thereof; Fig. 3i s' 'a side elevational view of the invention illustrating the application of the same in an adding machine, the latter being shown in fragmentary section; a r

Fig. 1' is a detail enlarged. fragmentary plan view of the present invention; and

.Fig. 5 is. a detail enlarged fragmentary elevationalview illustrating application of the invention to a ribbon spool.

In the drawings, in order to illustrate the a parent that 1n order to attach a new ribbon i it is .unnecessarytq remove the lower spool application of the present invention a'portion of an adding'machine generally designated 6 is provided which may be of standard construction and includes a: lower ribbon spool 7 and an upper ribbon spool 8. The

adding machine likewise includes a casing.

' having a removable upper part 9 and a movable plate 10 in whichan opening 11 is formed to permit engagement oftype bars 12 therethr'ough for urging a ribbon 13'into impinges ment with paper or the like which may be trained about a-vplaten 14. The platen 14 is movable, in a manner well known in the fibbon spool with an inelastic element to which art; and 11a pcrtion'theredf which nor mally projects iew tlie opening. 11; of the plate -'10.; The tdevieezcf -the presentiinven tion consists of an elastic. body l5'which may be made ofrubberor like material andmay be of oblongconfigurationasshown in the drawings. The opposite ends of; the elastic means or body '15 isgrooved or rabb eted to accommodate inelastic tabs 16'. It is, of

be otherwise connected to the elastic'body 15 but' the manner of connection herein shown serves to 'illustrate the principleof the invention. 1

' f In use of this 'device one ofthe tabs 16 is adapted to be engaged with the lower ribbonspools Zpand to be clamped from displacement thereon by a "clamping 'clip- 17 of standard construction. The opposite tab 16 course, to be understoodthat the tabs 16 may Y is adapted to be pinned or otherwise secured to'the ribbon 13, as indicated at 18. Consequently, when a new ribbon is to be sub stltuted for the old one the platen 14: is

moved clear of the opening 11 thereby permitting the fingers of the operator to be inserted through the opening 11 ,and'grasp the ribbon13. Pressure isiexerted uponthe ribbon 13' until the elastic I element '15 is flexed to a point where the tab 16 which engages the ribbon'13 is in proximity to the opening 11. When in this position the old outer of the tabs 16 and pressure released fromrsaid tab sov asto permit the elastic" element 15 to'contract and draw the ribbondownwardly towardthe spool 7. The upper roller 8 is'removed by disengaging the upper part 9 of the adding machine casing and thewopposite end of the new ribbon rolled thereon.- In view of the "above it is ape 7 and hence considerable'ftime and labor 'is saved in disengaginlg parts of the adding machine so that access canbe gained to the j I V lower roller. 1

Diflerentjchanges may bemade the Jdevice especially in the materials employed, 1

f size and shape of the device, etc. within the scope of the claims hereto appended.

What is claimed'is 1 In combination with an adding machine casing provided with a platen receiving opening therein and equipped in said casing with ribbon spools one of which is arranged above and the other below the opening, an

' easing provided with a platen receiving attachment for connection to an inking ribbon including an element one end ofwhich opening theieinzand equipped in said casing with ribbon rollers arranged above and below the openingyan inelastictab' secured to one of said ribbon rollers, an elastic element one end of which is engaged with said tab and equipped with :a ribbon engaging inelastic tab, saidelasti'c element being flexible to permit the 'ribbon engaging tab to be" urgedinto proximity to the platen opening 29 of the casing. I a In testimony whereof I aflix my signature.

' BENJAM'INSHAW SMITH. 

